Merge pull request FriendsOfSymfony#2331 from XWB/readme

Readme update

Author: XWB

README.markdown

@@ -15,9 +15,6 @@ Features include:
 **Note:** This bundle does *not* provide an authentication system but can
 provide the user provider for the core [SecurityBundle](https://symfony.com/doc/current/book/security.html).
 
-**Caution:** This bundle is developed in sync with [symfony's repository](https://github.com/symfony/symfony).
-For Symfony 2.0.x, you need to use the 1.2.0 release of the bundle (or lower)
-
 [![Build Status](https://travis-ci.org/FriendsOfSymfony/FOSUserBundle.svg?branch=1.3.x)](https://travis-ci.org/FriendsOfSymfony/FOSUserBundle)
 
 Documentation